Mark Zuckerberg

He can now officially change his surname to Zuckerbucks. With his 28.2 percent ownership in Facebook, the paper wealth of Facebook co-founder Mark Zuckerberg now serves as an eternal rejoinder to the legion of armchair critics--and where are they now?--who thought that the then-22-year-old was bull goose loony for rejecting Yahoo's $1 billion buyout offer in 2006. Maybe they should ask the same question of Yahoo's former CEO, Terry Semel, who reportedly refused to up the offer for the up-and-coming social network.

Little did he--or the rest of us--know. But Zuckerberg was determined to stick it out and stay true to his vision for Facebook. Has being right ever been so sweet?